CN101924247B - Lithium ion battery grouping method - Google Patents

Lithium ion battery grouping method Download PDF

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Publication number
CN101924247B
CN101924247B CN201010239979A CN201010239979A CN101924247B CN 101924247 B CN101924247 B CN 101924247B CN 201010239979 A CN201010239979 A CN 201010239979A CN 201010239979 A CN201010239979 A CN 201010239979A CN 101924247 B CN101924247 B CN 101924247B
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battery
batteries
lithium ion
voltage
grade
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CN101924247A (en
Inventor
季马贵
袁春刚
李恩国
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Shuangdeng Group Co Ltd
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JIANGSU SHUANGDE GROUP CO Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention discloses a lithium ion battery grouping method, which comprises the following steps: a) grading the batteries produced in the same batch by a lithium ion battery capacity division cabinet in accordance with the grade of 0.1 Ah; b) placing the graded batteries for a certain time; c) after placing the batteries, serially connecting the batteries with the capacity in the same grade according to the required number in each group; d) connecting a voltmeter to each battery in parallel, recording the open-circuit voltage of each battery and removing the battery the voltage deviation of which is more than 0.05 V, and replacing with other batteries with the same specification; e) configuring the resistive load according to the requirements of the discharge parameters of the group of batteries; f) connecting the batteries to the resistive load in series, quickly recording the voltage of a single battery and cutting off the load; and g) grading the batteries according to the voltage difference of a single battery before and after the load is connected in accordance with the grade of 0.05 V, and directly grouping the batteries in the same grade. The efficiency of the battery pack grouped by the method is maximized.

Description

A kind of lithium ion battery grouping method
Technical field
The present invention relates to a kind of lithium ion battery grouping method.
Background technology
High power lithium ion cell needs several the single battery parallel connections with low internal resistance satisfying the ability of high current charge-discharge, and becomes one group with the several piece high power lithium ion cell is monomer series-connected again for the voltage request that adapts to load.It is consistent that parameters such as the internal resistance of these batteries of theory demand, capacity are wanted, thereby the power that battery is discharged is maximum.Because it is all variant that working condition, manufacturing environment, material behavior, equipment influence make for the geometrical property of same batch battery parameter such as monomer rated capacity, monomer open circuit voltage, monomer charging voltage platform, monomer discharge voltage plateau, monomer internal resistance, monomer etc.; The present method of manufactory is: through obtaining these parameters of battery cell after the plurality of devices test; Rule of thumb make the error band of combo, in the scope that error band allows, carry out combo.The defective of this method is: the battery pack after the combo like this, because the reference condition of environment and test parameter are different during actual the use, during use, the efficient of battery is brought into play less than optimum, and the high-power battery group is particularly outstanding.
Summary of the invention
The purpose of this invention is to provide a kind of lithium ion battery grouping method, satisfy of the requirement, particularly high power lithium ion cell group of lithium ion battery group charge-discharge characteristic, make the efficient of its battery pack perform to optimum in groups cell.
The objective of the invention is to realize through following technical scheme:
Method of the present invention is the voltage difference that tests out each cell with the battery pack operating current, stipulates that certain limits of error scope carries out the combo with capacity.
Method comprises the steps:
A) with the battery of same batch of production, carry out stepping for one grade by 0.1Ah with lithium ion battery partial volume cabinet;
B) battery behind the stepping is shelved a period of time;
C), the battery of capacity at same shelves is together in series by every group of required quantity through after shelving;
D) parallel connection connects voltmeter on every battery, notes the open circuit voltage of every battery, and voltage difference is rejected greater than the battery of 0.05V, with the replacement of same specification;
E) according to the requirement of the discharge parameter of this Battery pack, configure resistive load;
F) battery strings connects resistive load, note the voltage of each cell rapidly after, cut off load;
G) according to the voltage difference before and after the connection load of each monomer, carry out stepping again, with the direct combo of shelves battery by 0.05V.
Above-mentioned lithium ion battery grouping method was shelved 72 hours the battery behind the stepping among the step b at least.
Voltage difference is meant the difference between the maximum voltage and minimum voltage in the Battery pack.
Beneficial effect of the present invention:
Use this method that lithium ion battery is carried out combo, can overcome the defective that simple use plurality of devices is tested the inner parameter that obtains battery cell, through battery discharge is write down its discharge parameter; Confirm the inside battery parameter; Come battery is carried out combo through the inside battery parameter of discharging measured to battery, when being made into the high-rate battery discharge of group like this, capacity is higher; Depth of discharge is bigger; Efficient through the battery pack after this method combo can perform to optimum, and needed testing equipment also realizes than being easier to, and has very strong operability.
Embodiment
Embodiments of the invention are chosen the 65180 electric cores of our company, and lot number is 100623 batches, by one grade of 0.1Ah battery are carried out stepping with lithium ion battery partial volume cabinet, and Capacity Selection is that cell 2 boxes of 5.3Ah to 5.4Ah are numbered 001 #35,002 #35, amount to 70, require to be made into 10 battery combos 36V 5Ah battery pack together, the battery power discharge electric current is 12A.Respectively joining a battery pack by traditional method for group matching and the inventive method detects.Process and test data are following:
Comparative example
Conventional method:
001 #The box battery is used the conventional method combo: on the basis of one grade of every 0.1Ah; After the monomer that exceeds 50mV according to difference in open circuit voltage is rejected 2; Carry out the internal resistance test again and the internal resistance difference is rejected 1 monomer once more greater than the monomer of 1m Ω, from 32 remaining monomers, get 10 arbitrarily and be made into one group.The production code member of processing is IMPDG211005001.
Embodiment 1
Method for group matching of the present invention, through following steps to 002 #The box battery carries out combo:
1, select the same capacity shelves electricity core of difference less than 0.1Ah, this example is 002 of 5.3Ah~5.4Ah #35 on box battery.
2, the battery behind the stepping was shelved more than 72 hours 002 at least #The partial volume date of box battery is on July 15th, 2010, and the date of dividing into groups is on July 21st, 2010, shelves 6 days, meets the demands.
3, the battery of capacity at same shelves is together in series by every group of required quantity, appoints and get 10 batteries and connect with battery folder.
4, parallel connection connects voltmeter on every battery, and record for ease begins electric core from number consecutively to No. ten from the total negative terminal of battery pack, and record data are seen record sheet 1, and are visible from table, and the difference of open circuit voltage is less than 0.05V, and monomer electricity core meets the requirements.
5, the requirement according to the discharge parameter of this Battery pack is discharging current 12A, configures resistive load, and adjustment power rheostat 20A4 Ω is that 38V/12A approximates 3.2 Ω (voltage platform of 10 battery series connection is 38V) when full electricity.
6, battery strings connects the rheostat of resistive load 3.2 Ω, note the voltage of each cell rapidly after, cut off load; Record data are seen table 1, and the electric core after will testing carries out stepping by one grade of every 0.05V and place, and are arranged on one grade of 3.66~3.70V for the ease of the operation stepping; 3.71~3.75V second gear, 3.76~3.80V third gear, 3.81~3.85V fourth gear; 3.86 five grades of~3.90V, six grades of 3.90~3.95V, seven grades of 3.96~4.00V or the like.
7, repeating step 3-6 amounts to 3 times, wherein for the first time in the battery of test, selects sequence number and is 1,2,3,5,6,7,8 battery and return fourth speed, and sequence number is that 4,9 battery is returned the 5th grade, and sequence number is that 10 battery is returned the 6th grade; For the second time in the battery of test, select sequence number and be 8 battery and return third gear, select sequence number and be 1,2,3,5,7,9 battery and return fourth speed, sequence number is that 4,6,10 battery is returned the 5th grade; In the battery of test, sequence number is that 1,3,5,6,9,10 battery is returned fourth speed for the third time, and sequence number is that 2,4,7,8 battery is returned the 5th grade.35 monomers in this example are reserved 5 accidents, stay time combo test.
8, we appoint in dividing 19 batteries of fourth speed and get 10 and be made into one group: institute power taking pond is for testing for the first time sequence number 5,6,8; Test for the second time sequence number 3,5,9; The battery of testing sequence number 3,5,6,9 for the third time is made into one group, and the production code member of processing is IMPDG211005002.
Table 1 open circuit voltage and load voltage test data record sheet
Embodiment 2
IMPDG211005001 and IMPDG211005002 are carried out test comparison, verify the superiority of method for group matching of the present invention.The battery capacity test:
Table 2 volume test record sheet
Test parameter IMPDG211005001 IMPDG211005002
1A charging 5A discharge 5.25Ah 5.24Ah
1A charging 8A discharge 4.95Ah 5.2Ah
1A charging 10A discharge 4.8Ah 5.05Ah
1A charging 15A discharge 4.5Ah 4.85Ah
Visible from table, the battery of employing the inventive method combo, capacity is apparently higher than the battery of other method for group matching of same specification electricity core when heavy-current discharge.
Terminal voltage when battery power discharge is ended:
Table 3 terminal voltage test recording table
Test parameter IMPDG211005001 IMPDG211005002
1A charging 5A discharge 33.5V 33.5V
1A charging 8A discharge 35V 34.2V
1A charging 10A discharge 36.5V 35.1V
1A charging 15A discharge 37V 35.5V
From table, can find out; Adopt the battery of the inventive method combo, discharge cut-off voltage is lower than the battery of other method for group matching of same specification electricity core, explains that the battery power discharge degree of depth is bigger; Capacity just is able to give full play to, and is to reach the main cause that battery after the combo still has very high efficient.

Claims (2)

1. a lithium ion battery grouping method is characterized in that this method comprises the steps:
A) with the battery of same batch of production, carry out stepping for one grade by 0.1Ah with lithium ion battery partial volume cabinet;
B) battery behind the stepping is shelved a period of time;
C), the battery of capacity at same shelves is together in series by every group of required quantity through after shelving;
D) parallel connection connects voltmeter on every battery, notes the open circuit voltage of every battery, and voltage difference is rejected greater than the battery of 0.05V, with the replacement of same specification;
E) according to the requirement of the discharge parameter of this Battery pack, configure resistive load;
F) battery strings connects resistive load, note the voltage of each cell rapidly after, cut off load;
G) according to the voltage difference before and after the connection load of each monomer, be one grade by 0.05V and carry out stepping, with the direct combo of shelves battery.
2. lithium ion battery grouping method according to claim 1 is characterized in that among the step b battery behind the stepping being shelved 72 hours at least.
CN201010239979A 2010-07-29 2010-07-29 Lithium ion battery grouping method Active CN101924247B (en)

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Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102760907B (en) * 2011-04-29 2014-07-02 广州丰江电池新技术股份有限公司 Method for assembling rechargeable lithium battery pack
CN103050739A (en) * 2011-10-14 2013-04-17 深圳市海盈科技有限公司 Pairing method of lithium ion battery
CN102394315B (en) * 2011-11-18 2014-02-19 武汉银泰科技燃料电池有限公司 Cell characteristic vector based lithium ion cell configuration method
CN102544606B (en) * 2012-01-18 2014-02-05 杭州高特电子设备有限公司 Cluster analysis based lithium battery unit matching method
CN103390775A (en) * 2012-05-08 2013-11-13 浙江南博电源科技有限公司 Grouping method for lithium iron phosphate secondary batteries
CN103337670B (en) * 2013-05-30 2016-08-10 合肥国轩高科动力能源有限公司 A kind of improve metal shell type electrokinetic cell concordance and the method for safety
CN103311589B (en) * 2013-06-27 2015-09-09 浙江天能电池(江苏)有限公司 Storage battery pressure reduction method method for group matching
CN103427095A (en) * 2013-08-16 2013-12-04 深圳市鼎力源科技有限公司 Manufacturing method of high-capacity power-type battery pack
CN104485474B (en) * 2014-12-04 2017-01-11 上海交通大学 Electric vehicle battery pack matching method based on coincidence indicator
CN106058279B (en) * 2016-05-29 2018-06-05 合肥国轩高科动力能源有限公司 A kind of lithium battery pack method for group matching
JP2018029029A (en) * 2016-08-19 2018-02-22 東洋ゴム工業株式会社 Manufacturing method of battery pack using used batteries and battery pack
CN109201520A (en) * 2017-07-05 2019-01-15 深圳格林德能源有限公司 A kind of lithium ion battery combo technique
CN107492689A (en) * 2017-08-02 2017-12-19 双登集团股份有限公司 Data center's batteries for high discharge rate method for group matching

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CN101764259A (en) * 2010-01-15 2010-06-30 苏州星恒电源有限公司 Method for group matching of power lithium-ion rechargeable battery
CN101783423A (en) * 2009-12-31 2010-07-21 章森 Battery core optimized matching technique

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
CN101783423A (en) * 2009-12-31 2010-07-21 章森 Battery core optimized matching technique
CN101764259A (en) * 2010-01-15 2010-06-30 苏州星恒电源有限公司 Method for group matching of power lithium-ion rechargeable battery

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